Abstract : A documentation system has been established for abstracting, indexing, and retrieving data relating to the electrical and electronic properties of insulator and semiconductor materials. The system is a coordinate index type immediately usable as a manual system and adaptable to machine methods of data storage and retrieval. The data acquired and indexed is published in the form of property tables, data sheets, and summary reviews. Methods used in the documentation, compilation, and evaluation of the data are described and examples of format illustrated. Appended are an index to semiconductor and insulation material names and a glossary of selected properties and symbols. (Author)